Question

The current in a wire depends on:

• A. The temperature of the wire.
• B. The resistance of the wire.
• C. The potential difference applied across the wire.
• D. Resistance and potential difference.

Hint:

Use Ohm’s Law (\(I = \frac{V}{R}\)) to understand how the current depends on both the potential difference and the resistance of the wire.

Answer 1

The Correct Option is D

Step 1: Understanding Ohm’s Law.
According to Ohm’s Law, the current in a wire is directly proportional to the potential difference (voltage) across the wire and inversely proportional to the resistance of the wire. \[ I = \frac{V}{R} \] Step 2: Effect of resistance.
The resistance of the wire affects the current because as the resistance increases, the current decreases for a given voltage. Step 3: Effect of potential difference.
The current increases when the potential difference increases, assuming the resistance remains constant. Step 4: Conclusion.
Thus, the current depends on both the resistance and the potential difference applied across the wire.